Radar system for a road vehicle with improved calibration

The invention relates to a radar system (6) and a method for improved calibration of a radar system (6). there is provided a radar system (6) for detecting the surroundings of a road vehicle (1) comprising a transmitting antenna assembly (7) for emitting radar radiation (11) and a receiving antenna assembly (8) for receiving of objects (13) in the environment (12) of the road vehicle (1 ) reflected radar radiation (14) and an evaluation device (15), said receiving antenna array (8) and de transmission antenna arrangement (7) for several (at least two) antenna strands (91-98, 111-118, have 131-139), each antenna strand (91-98, 111-118, 131-139) having a longitudinal direction along which the antenna line (111, 113, 115, 117) has a greater extension than transversely thereto, wherein in each of the antenna arrangements (7, 8), some of the antenna strands (91-98, 111-118, 131-138) are arranged parallel to each other and are spaced apart transversely to the respective longitudinal direction from each other, wherein the evaluation device (15) is received on the basis of en reflected radar radiation (14) for the respective radar beam (11) to determine reflective objects an azimuthal angle (φ) in a Azimutalmessebene (20), wherein the Azimutalmessebene (20) perpendicular (to the longitudinal directions of some antenna strands 91-98, 111- 118, 131-138) is oriented, wherein, in the transmitting antenna assembly (7) and / or (with the receiving antenna array 8), at least one of the plurality of antenna strands (91-98, 111-118, 131-139) to at least one other of the antenna strands ( 91-98, 111-118, 131-139) with respect to the longitudinal direction of at least one other antenna strand (111, 113, 115, 117) is offset and the evaluation device (15) is further formed an elevation angle (θ) for the respective (11) to determine reflecting object (13) radar beam, the elevation angle (θ) is determined perpendicular to the Azimutalmessebene (20).